Question

Hello guys!!!
Please answer all the above questions....
.......:):):)........!!!!​

Answer 1

Here is your answer...

16. Children play under trees, the most useful things in the world.

17. If there are no trees, there will be no life on earth.

18. Oxygen from the air is breathed in and carbon dioxide is breathed out by them.

Hope this helps you friend...

Be brainly ☺☺☺